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Fix problem with zero valued map registers followed by valid map entries.

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The previous code just ignored the invalid map register, but this gave
surprising results because of the way pci_map_port() associated the map
register offset supplied with a map entry in the map array.
This commit is contained in:
Stefan Eßer 1999-01-19 23:29:20 +00:00
parent cc133fa302
commit 441e39d74a
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=42867
5 changed files with 19 additions and 14 deletions
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3
sys/dev/pci/pci.c
View File

@ -23,7 +23,7 @@
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $Id: pci.c,v 1.91 1998/11/09 08:08:06 peter Exp $
* $Id: pci.c,v 1.92 1999/01/12 01:44:42 eivind Exp $
*
*/
@ -190,6 +190,7 @@ pci_readmaps(pcicfgregs *cfg, int maxmaps)
testval = pci_cfgread(cfg, reg, 4);
pci_cfgwrite(cfg, reg, base, 4);
map[j].reg = reg;
map[j].base = pci_mapbase(base);
map[j].type = pci_maptype(base);
map[j].ln2size = pci_mapsize(testval);

4
sys/dev/pci/pcivar.h
View File

@ -23,7 +23,7 @@
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $Id: pcivar.h,v 1.23 1998/12/14 05:47:29 dillon Exp $
* $Id: pcivar.h,v 1.24 1999/01/13 04:59:19 bde Exp $
*
*/
@ -66,7 +66,7 @@ typedef struct {
#define PCI_MAPPORT 0x04 /* port map */
u_int8_t ln2size;
u_int8_t ln2range;
/* u_int8_t dummy;*/
u_int8_t reg; /* offset of map register in config space */
} pcimap;
/* config header information common to all header types */

3
sys/pci/pci.c
View File

@ -23,7 +23,7 @@
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $Id: pci.c,v 1.91 1998/11/09 08:08:06 peter Exp $
* $Id: pci.c,v 1.92 1999/01/12 01:44:42 eivind Exp $
*
*/
@ -190,6 +190,7 @@ pci_readmaps(pcicfgregs *cfg, int maxmaps)
testval = pci_cfgread(cfg, reg, 4);
pci_cfgwrite(cfg, reg, base, 4);
map[j].reg = reg;
map[j].base = pci_mapbase(base);
map[j].type = pci_maptype(base);
map[j].ln2size = pci_mapsize(testval);

19
sys/pci/pci_compat.c
View File

@ -23,7 +23,7 @@
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $Id: pci_compat.c,v 1.18 1999/01/13 04:59:19 bde Exp $
* $Id: pci_compat.c,v 1.19 1999/01/14 06:22:10 jdp Exp $
*
*/
@ -59,13 +59,16 @@
static int
pci_mapno(pcicfgregs *cfg, int reg)
{
int map = -1;
if ((reg & 0x03) == 0) {
map = (reg -0x10) / 4;
if (map < 0 || map >= cfg->nummaps)
map = -1;
}
return (map);
int i, nummaps;
pcimap *map;
nummaps = cfg->nummaps;
map = cfg->map;
for (i = 0; i < nummaps; i++)
if (map[i].reg == reg)
return (i);
return (-1);
}
static int

4
sys/pci/pcivar.h
View File

@ -23,7 +23,7 @@
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $Id: pcivar.h,v 1.23 1998/12/14 05:47:29 dillon Exp $
* $Id: pcivar.h,v 1.24 1999/01/13 04:59:19 bde Exp $
*
*/
@ -66,7 +66,7 @@ typedef struct {
#define PCI_MAPPORT 0x04 /* port map */
u_int8_t ln2size;
u_int8_t ln2range;
/* u_int8_t dummy;*/
u_int8_t reg; /* offset of map register in config space */
} pcimap;
/* config header information common to all header types */